'Dung' in the Bible

And he answering said unto him, Lord, let it alone this year also, till I shall dig about it, and dung it:

It is proper neither for land nor for dung; it is cast out. He that hath ears to hear, let him hear.

Yea doubtless, and I count all things but loss for the excellency of the knowledge of Christ Jesus my Lord: for whom I have suffered the loss of all things, and do count them but dung, that I may win Christ,